Velleman-projects EDU06 Assembly instructions Manual do Utilizador descarregar pdf (Página 6)

Experiment 1: Measuring AC voltage

Connection layout:

Connection summary:

GND clip : 2

Probe tip : 1

Purpose:

The purpose of this experiment is to display and measure AC voltage. In this particular case, we will

measure the AC voltage supplied to the board.

How?:

Turn on the HPS140 Handheld Pocket Scope 1. (see HPS140 manual for How-To instructions).

Place the probe switch “x1/x10” to ‘x1’.2.

The unit always starts up in ‘auto-setup’ mode. You can tell that

it is in auto-setup mode, because the readouts for Volts/div and

Time/div are displayed in ‘reverse video’ (white characters on

dark background). Thanks to the auto-setup mode, the unit takes care of V/div and time/div for you,

you do not have to do anything. In the lower right-hand corner, the RMS value of the supplied AC

voltage is displayed. More about auto-setup in the next experiment.

What we see:

Select ‘AC coupling’ • (see HPS140 manual for How-To instructions)

Set time/div to 5ms/div•

Set volts/div: to 10V/div•

Note: the readout in the bottom right hand corner displays the RMS value of the measured AC voltage.

Different readouts are available (see HPS140 manual for How-To instructions).

Note: If you live in an area where the AC grid frequency is 60Hz instead of 50Hz (e.g. US), the image may

slightly vary.

es care of V/div and time/div for you

Exp.1: measuring AC voltage

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NOTES:

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